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Heart rate detecting module and method

Inactive Publication Date: 2018-09-20
PIXART IMAGING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a device that uses a special sensor to detect changes in light intensity and the movement of laser specks. This technology allows for the creation of a wider dynamic range, which improves the accuracy and reduces the noise of the detection signals. Overall, this device provides better results for heart rate detection.

Problems solved by technology

However, single pixel usually has insufficient dynamic range and may resulted in too high noise ratio and so as to decrease the detection accuracy.
Therefore, how to reduce noise influence and upgrade the detection accuracy are important issues in the art.

Method used

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  • Heart rate detecting module and method

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first embodiment

[0023]Please refer to FIG. 1, FIG. 2 and FIG. 4. FIG. 1 shows a schematic view of a heart rate detecting module of the first embodiment about a light passing through a subject in the instant disclosure, FIG. 2 shows a schematic view of a heart rate detecting module of the first embodiment about a light being reflected from a subject in the instant disclosure, and FIG. 4 shows a schematic view of an image sensor of the first embodiment in the instant disclosure. As shown in FIG. 1, the heart rate detecting module M of this embodiment includes an image sensor 10, a processor 20 and a light source 30. However, in other embodiments, the heart rate detecting module M may include a plurality image sensors 10, processors 20 and light sources 30, the number of the image sensor 10, the processor 20 and the light source 30 can be adjusted depending on requirements. In more details of FIG. 1, the image sensor 10 includes a sensor array which contains a plurality of pixels and is used to genera...

second embodiment

[0034]A heart rate detecting module M of the second embodiment in this instant disclosure includes an image sensor 10 and a processor 20. The image sensor 10 generates a plurality of laser speckles according to a laser light from a subject S. The processor 20 outputs a heart rate value H based on a change of at least one displacements of the plurality of laser speckles.

[0035]Please refer to FIG. 7. FIG. 7 shows a flowchart of a heart rate detecting method of the second embodiment in this instant disclosure. The heart rate detecting method of the second embodiment is a speckle pixel positioning method. Specifically, it includes the following steps, as shown in steps S701 to S711 in FIG. 7, a heart rate detecting method of the second embodiment in this instant disclosure includes the following steps. Firstly, in step S701 and step S703, a light source 30 is used to emit a laser light toward to a subject S, then an image sensor 10 receives the laser light passing through or reflected f...

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Abstract

This instant disclosure provides a heart rate detecting module which includes an image sensor and a processor. The image sensor generates a plurality of image frames according to a light from a subject. The processor outputs a heart rate value based on a light intensity variance of the plurality of image frames. This instant disclosure further provides a heart rate detecting method which includes the following steps. A plurality of image frames are generated according to a light from a subject by an image sensor, and a heart rate value is outputted based on a light intensity variance of the plurality of image frames by a processor.

Description

BACKGROUND OF THE INVENTION1. Field of the Invention[0001]The instant disclosure relates to a detecting module and method; in particular, to a heart rate detecting module and method.2. Description of Related Art[0002]Generally, a PPG (photoplethysmogram) system is used to detect the heart rate according to the light brightness (light absorption) using a pulse oximeter which illuminates the skin and measures the changes in light absorption. When the heart contracts that has the maximum peripheral blood volume and light absorption and correspondingly has the minimum light brightness, and when the heart relaxes that has the maximum light brightness. So that a heartbeat can be determined. Accordingly, a heart rate detecting system has the dynamic range capable of detecting the maximum to minimum light intensity is necessary.[0003]In the current PPG system, it usually includes a light source and a detector, and a pixel is used. However, single pixel usually has insufficient dynamic range...

Claims

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Application Information

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IPC IPC(8): A61B5/024A61B5/00
CPCA61B5/02427A61B5/7225A61B2576/00A61B2562/0238A61B2562/046A61B5/7278
Inventor GU, REN-HAU
Owner PIXART IMAGING INC
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